Belize City (BZE) – The primary international airport of Belize is called The Philip S.W. Goldson International Airport, and it is located 10 miles from the largest city, Belize City. PGIA is the airport where all the international flights arrive. It is a modern airport with full equipment. Overnight parking is also available at the main Belize Airport.
Belize City Municipal (TZA) – This is a national airport for domestic flights to and from the largest cities in the country.

There are also local airlines such as Tropic Air and Maya Island Air. The abbreviations (TA and MIA) are more commonly used.
statisticsbelize.org.bz offers you a list of the airports which are providing services by TA and MIA.

San Pedro (SPR)
Caye Caulker (CUK)
Corozal (CZH)
Dangriga (DGA)
Placencia (PLJ)
Punda Gorda (PND)
Belmopan (BCV)
Orange Walk (ORZ).
In the Graph below are shown the results from the Belize’s top 12 airports analysis, monthly one-way seat capacity in S17.

Assuming you are interested in the Belize’s economy, you should check out the post about Belize’s Top Country Markets Analysis.